Remove trailing whitespace.

Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>

library/HTMLPurifier/HTMLModule/Tidy/XHTML.php

@@ -2,15 +2,15 @@
 
 class HTMLPurifier_HTMLModule_Tidy_XHTML extends HTMLPurifier_HTMLModule_Tidy
 {
-    
+
     public $name = 'Tidy_XHTML';
     public $defaultLevel = 'medium';
-    
+
     public function makeFixes() {
         $r = array();
         $r['@lang'] = new HTMLPurifier_AttrTransform_Lang();
         return $r;
     }
-    
+
 }